Tube à électrons secondaires,申请号FRD858466-传众专利搜索

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发明名称	Tube à électrons secondaires
摘要
申请公布号	FR858466(A)	申请公布日期	1940.11.26
申请号	FRD858466	申请日期	1939.07.28
申请人	FERNSEH AKTIENGESELLSCHAFT	发明人
分类号	H01J43/28	主分类号	H01J43/28
代理机构		代理人
主权项
地址

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